Aquest tema tractarà els codis ASCII i com escriure un programa per imprimir una taula ASCII en el llenguatge de programació C. ASCII significa Codi estàndard americà per a l'intercanvi d'informació . El codi ASCII és un esquema de codificació de caràcters utilitzat per definir el valor dels elements bàsics de caràcters per intercanviar informació en ordinadors i altres dispositius electrònics.
A més, el codi ASCII és una col·lecció de 255 símbols en el conjunt de caràcters, dividit en dues parts, el codi ASCII estàndard i el codi ASCII estès. El codi ASCII estàndard va de 0 a 127, 7 bits de llarg, i el codi ASCII estès de 128 a 255 és de 8 bits. Aquests caràcters són una combinació de lletres símbols (majúscules i minúscules (a-z, AZ), dígits (0-9), caràcters especials (!, @, #, $, etc.), signes de puntuació i caràcters de control. Per tant, podem dir que cada caràcter té el seu propi valor ASCII.
Per exemple, quan introduïm una cadena com a 'HELLO', la màquina de l'ordinador no emmagatzema directament la cadena que hem introduït. En canvi, el sistema emmagatzema les cadenes en el seu valor ASCII equivalent, com ara '7269767679'. El valor ASCII de H és 72, E és 69, L és 76 i O és 79.
Programa per obtenir el valor ASCII de les majúscules
Programa.c
#include int main() { // declare local variable int caps; // use for loop to print the capital letter from A to Z for ( caps = 65; caps <91; caps++) { printf ('
the ascii value of %c is %d ', caps, caps); } return 0; < pre> <p> <strong>Output</strong> </p> <pre> The ASCII value of A is 65 The ASCII value of B is 66 The ASCII value of C is 67 The ASCII value of D is 68 The ASCII value of E is 69 The ASCII value of F is 70 The ASCII value of G is 71 The ASCII value of H is 72 The ASCII value of I is 73 The ASCII value of J is 74 The ASCII value of K is 75 The ASCII value of L is 76 The ASCII value of M is 77 The ASCII value of N is 78 The ASCII value of O is 79 The ASCII value of P is 80 The ASCII value of Q is 81 The ASCII value of R is 82 The ASCII value of S is 83 The ASCII value of T is 84 The ASCII value of U is 85 The ASCII value of V is 86 The ASCII value of W is 87 The ASCII value of X is 88 The ASCII value of Y is 89 The ASCII value of Z is 90 </pre> <h3>Program to get the ASCII value of the small letters</h3> <p> <strong>Program2.c</strong> </p> <pre> #include int main() { // declare local variable int small; // use for loop to print the small alphabets letter from a to z for ( small = 97; small <123; small++) { display ascii values to its equivalent characters printf ('
the value of %c is %d ', small, small); } return 0; < pre> <p> <strong>Output</strong> </p> <pre> The ASCII value of a is 97 The ASCII value of b is 98 The ASCII value of c is 99 The ASCII value of d is 100 The ASCII value of e is 101 The ASCII value of f is 102 The ASCII value of g is 103 The ASCII value of h is 104 The ASCII value of i is 105 The ASCII value of j is 106 The ASCII value of k is 107 The ASCII value of l is 108 The ASCII value of m is 109 The ASCII value of n is 110 The ASCII value of o is 111 The ASCII value of p is 112 The ASCII value of q is 113 The ASCII value of r is 114 The ASCII value of s is 115 The ASCII value of t is 116 The ASCII value of u is 117 The ASCII value of v is 118 The ASCII value of w is 119 The ASCII value of x is 120 The ASCII value of y is 121 The ASCII value of z is 122 </pre> <h3>Program to get the ASCII value of the given characters</h3> <p> <strong>Program3.c</strong> </p> <pre> #include int main() { char arr[30]; // declare the size of character array int count = 0; // declare a count variable // enter any name to get the ascii codes printf ('
Enter the name to get the ASCII codes: '); scanf (' %s', &arr); // use while loop to sequentially iterate every characters of the array while (arr[count] != ' ') { // display the character name one by one printf ('
The ascii code of the character %c is %d ', arr[count], arr[count]); count++; // increment one by one } return 0; } </pre> <p> <strong>Output</strong> </p> <pre> Enter the name to get the ASCII codes: JAVATPOINT The ASCII code of the character J is 74 The ASCII code of the character A is 65 The ASCII code of the character V is 86 The ASCII code of the character A is 65 The ASCII code of the character T is 84 The ASCII code of the character P is 80 The ASCII code of the character O is 79 The ASCII code of the character I is 73 The ASCII code of the character N is 78 The ASCII code of the character T is 84 </pre> <h3>Program to get the ASCII value of the special characters</h3> <p> <strong>Program4.c</strong> </p> <pre> #include int main() { // declare a variable int specialCh; for (specialCh = 33; specialCh <48; specialch++) { printf ('
the ascii value of '%c' special character is: %d', specialch, specialch); } for (specialch="58;" specialch < 65; 127; return 0; pre> <p> <strong>Output</strong> </p> <pre> The ASCII value of '!' special character is: 33 The ASCII value of ''' special character is: 34 The ASCII value of '#' special character is: 35 The ASCII value of '$' special character is: 36 The ASCII value of '%' special character is: 37 The ASCII value of '&' special character is: 38 The ASCII value of ''' special character is: 39 The ASCII value of '(' special character is: 40 The ASCII value of ')' special character is: 41 The ASCII value of '*' special character is: 42 The ASCII value of '+' special character is: 43 The ASCII value of ',' special character is: 44 The ASCII value of '-' special character is: 45 The ASCII value of '.' special character is: 46 The ASCII value of '/' special character is: 47 The ASCII value of ':' special character is: 58 The ASCII value of ';' special character is: 59 The ASCII value of '' special character is: 62 The ASCII value of '?' special character is: 63 The ASCII value of '@' special character is: 64 The ASCII value of '' special character is: 124 The ASCII value of '' special character is: 125 The ASCII value of '~' special character is: 126 </pre> <h3>Program to print the complete ASCII tables in C</h3> <p> <strong>Program6.c</strong> </p> <pre> #include int main() { // declare a variable int asciTable; printf (' The complete ASCII table of the characters in the C '); for (asciTable = 0; asciTable <255; ascitable++) { printf ('
the value of '%c' character is: %d', ascitable, ascitable); } return 0; < pre> <p> <strong>Output</strong> </p> <img src="//techcodeview.com/img/c-tutorial/14/ascii-table-c-2.webp" alt="ASCII Table in C"> <hr></255;></pre></48;></pre></123;></pre></91;> Programa per obtenir el valor ASCII de les lletres minúscules
Programa 2.c
#include int main() { // declare local variable int small; // use for loop to print the small alphabets letter from a to z for ( small = 97; small <123; small++) { display ascii values to its equivalent characters printf (\'
the value of %c is %d \', small, small); } return 0; < pre> <p> <strong>Output</strong> </p> <pre> The ASCII value of a is 97 The ASCII value of b is 98 The ASCII value of c is 99 The ASCII value of d is 100 The ASCII value of e is 101 The ASCII value of f is 102 The ASCII value of g is 103 The ASCII value of h is 104 The ASCII value of i is 105 The ASCII value of j is 106 The ASCII value of k is 107 The ASCII value of l is 108 The ASCII value of m is 109 The ASCII value of n is 110 The ASCII value of o is 111 The ASCII value of p is 112 The ASCII value of q is 113 The ASCII value of r is 114 The ASCII value of s is 115 The ASCII value of t is 116 The ASCII value of u is 117 The ASCII value of v is 118 The ASCII value of w is 119 The ASCII value of x is 120 The ASCII value of y is 121 The ASCII value of z is 122 </pre> <h3>Program to get the ASCII value of the given characters</h3> <p> <strong>Program3.c</strong> </p> <pre> #include int main() { char arr[30]; // declare the size of character array int count = 0; // declare a count variable // enter any name to get the ascii codes printf ('
Enter the name to get the ASCII codes: '); scanf (' %s', &arr); // use while loop to sequentially iterate every characters of the array while (arr[count] != ' ') { // display the character name one by one printf ('
The ascii code of the character %c is %d ', arr[count], arr[count]); count++; // increment one by one } return 0; } </pre> <p> <strong>Output</strong> </p> <pre> Enter the name to get the ASCII codes: JAVATPOINT The ASCII code of the character J is 74 The ASCII code of the character A is 65 The ASCII code of the character V is 86 The ASCII code of the character A is 65 The ASCII code of the character T is 84 The ASCII code of the character P is 80 The ASCII code of the character O is 79 The ASCII code of the character I is 73 The ASCII code of the character N is 78 The ASCII code of the character T is 84 </pre> <h3>Program to get the ASCII value of the special characters</h3> <p> <strong>Program4.c</strong> </p> <pre> #include int main() { // declare a variable int specialCh; for (specialCh = 33; specialCh <48; specialch++) { printf (\'
the ascii value of \'%c\' special character is: %d\', specialch, specialch); } for (specialch="58;" specialch < 65; 127; return 0; pre> <p> <strong>Output</strong> </p> <pre> The ASCII value of '!' special character is: 33 The ASCII value of ''' special character is: 34 The ASCII value of '#' special character is: 35 The ASCII value of '$' special character is: 36 The ASCII value of '%' special character is: 37 The ASCII value of '&' special character is: 38 The ASCII value of ''' special character is: 39 The ASCII value of '(' special character is: 40 The ASCII value of ')' special character is: 41 The ASCII value of '*' special character is: 42 The ASCII value of '+' special character is: 43 The ASCII value of ',' special character is: 44 The ASCII value of '-' special character is: 45 The ASCII value of '.' special character is: 46 The ASCII value of '/' special character is: 47 The ASCII value of ':' special character is: 58 The ASCII value of ';' special character is: 59 The ASCII value of '' special character is: 62 The ASCII value of '?' special character is: 63 The ASCII value of '@' special character is: 64 The ASCII value of '' special character is: 124 The ASCII value of '' special character is: 125 The ASCII value of '~' special character is: 126 </pre> <h3>Program to print the complete ASCII tables in C</h3> <p> <strong>Program6.c</strong> </p> <pre> #include int main() { // declare a variable int asciTable; printf (' The complete ASCII table of the characters in the C '); for (asciTable = 0; asciTable <255; ascitable++) { printf (\'
the value of \'%c\' character is: %d\', ascitable, ascitable); } return 0; < pre> <p> <strong>Output</strong> </p> <img src="//techcodeview.com/img/c-tutorial/14/ascii-table-c-2.webp" alt="ASCII Table in C"> <hr></255;></pre></48;></pre></123;> Programa per obtenir el valor ASCII dels caràcters donats
Programa 3.c
#include int main() { char arr[30]; // declare the size of character array int count = 0; // declare a count variable // enter any name to get the ascii codes printf ('
Enter the name to get the ASCII codes: '); scanf (' %s', &arr); // use while loop to sequentially iterate every characters of the array while (arr[count] != ' ') { // display the character name one by one printf ('
The ascii code of the character %c is %d ', arr[count], arr[count]); count++; // increment one by one } return 0; } Sortida
Enter the name to get the ASCII codes: JAVATPOINT The ASCII code of the character J is 74 The ASCII code of the character A is 65 The ASCII code of the character V is 86 The ASCII code of the character A is 65 The ASCII code of the character T is 84 The ASCII code of the character P is 80 The ASCII code of the character O is 79 The ASCII code of the character I is 73 The ASCII code of the character N is 78 The ASCII code of the character T is 84
Programa per obtenir el valor ASCII dels caràcters especials
Programa 4.c
#include int main() { // declare a variable int specialCh; for (specialCh = 33; specialCh <48; specialch++) { printf (\'
the ascii value of \'%c\' special character is: %d\', specialch, specialch); } for (specialch="58;" specialch < 65; 127; return 0; pre> <p> <strong>Output</strong> </p> <pre> The ASCII value of '!' special character is: 33 The ASCII value of ''' special character is: 34 The ASCII value of '#' special character is: 35 The ASCII value of '$' special character is: 36 The ASCII value of '%' special character is: 37 The ASCII value of '&' special character is: 38 The ASCII value of ''' special character is: 39 The ASCII value of '(' special character is: 40 The ASCII value of ')' special character is: 41 The ASCII value of '*' special character is: 42 The ASCII value of '+' special character is: 43 The ASCII value of ',' special character is: 44 The ASCII value of '-' special character is: 45 The ASCII value of '.' special character is: 46 The ASCII value of '/' special character is: 47 The ASCII value of ':' special character is: 58 The ASCII value of ';' special character is: 59 The ASCII value of '' special character is: 62 The ASCII value of '?' special character is: 63 The ASCII value of '@' special character is: 64 The ASCII value of '' special character is: 124 The ASCII value of '' special character is: 125 The ASCII value of '~' special character is: 126 </pre> <h3>Program to print the complete ASCII tables in C</h3> <p> <strong>Program6.c</strong> </p> <pre> #include int main() { // declare a variable int asciTable; printf (' The complete ASCII table of the characters in the C '); for (asciTable = 0; asciTable <255; ascitable++) { printf (\'
the value of \'%c\' character is: %d\', ascitable, ascitable); } return 0; < pre> <p> <strong>Output</strong> </p> <img src="//techcodeview.com/img/c-tutorial/14/ascii-table-c-2.webp" alt="ASCII Table in C"> <hr></255;></pre></48;> Programa per imprimir les taules ASCII completes en C
Programa 6.c
#include int main() { // declare a variable int asciTable; printf (' The complete ASCII table of the characters in the C '); for (asciTable = 0; asciTable <255; ascitable++) { printf (\\'
the value of \\'%c\\' character is: %d\\', ascitable, ascitable); } return 0; < pre> <p> <strong>Output</strong> </p> <img src="//techcodeview.com/img/c-tutorial/14/ascii-table-c-2.webp" alt="ASCII Table in C"> <hr></255;>