c - Concatenate char array and int array and store in string array -


i concatenate char array , int array , store them in char array. how that?

here code far

char letter[100]; int number[100], i;  char * letternum[100];  (i = 0; < 100; i++){  letternum[i] = strcat(letter[i], number[i]); }

expected output should

a1
b1
...

the strcat() function concatenates strings not chars, need sprintf()

sprintf(letternum[i], "%c%d", letter[i], number[i]);

and also, letternum in case array of pointers, should array of arrays, like

char letternum[100][3];

and then, can use snprintf() instead of sprintf() prevent buffer overflow

if (snprintf(letternum[i], 3, "%c%d", letter[i], number[i]) > 2)     youhavetodosomethin_an_error_occurred();

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