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How to use the sprintf() method in C
Using the library function sprintf() is the easiest way to convert an integer to a string in C.
Syntax
The function is declared in C as:
int sprintf(char *str, const char *format, [arg1, arg2, ... ]);
where,
stris a character array on which data is written.formatis a C string which describes the output, along with placeholders for the integer arguments to be inserted in the formatted string. It follows the same specifications asprintf().[arg1,arg2...]are the integer(s) to be converted.
Note the function’s return type is
int- it returns the length of the converted string.
The following examples will make it clearer:
Examples
int main() {float num = 9.34;printf("I'm a float, look: %f\n", num);char output[50]; //for storing the converted stringsprintf(output, "%f", num);printf("Look, I'm now a string: %s", output);}
1. Multiple arguments can also be used:
int main() {char output[50];int num1 = 3, num2 = 5, ans;ans = num1 * num2;sprintf(output, "%d multiplied by %d is %d", num1, num2, ans);printf("%s", output);return 0;}
2. sprintf returns the length of the converted string, as shown below:
int main() {int num = 3003;int length;char output[50]; //for storing the converted stringlength = sprintf(output, "%d", num);printf("The converted string is %s and its length is %d.", output, length);}
RELATED TAGS
integer
string
conversion
c
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