How can you convert between int and string in C language?

2 years ago
Liam
1 minute

In C language, you can use the sprintf function to convert an int type to a string type, and use the atoi function to convert a string type to an int type.

Here is an example code:

#include <stdio.h>
#include <stdlib.h>

int main() {
    int num = 123;
    char str[10];

    // 将int转化为string
    sprintf(str, "%d", num);
    printf("转化后的string为: %s\n", str);
    
    // 将string转化为int
    int convertedNum = atoi(str);
    printf("转化后的int为: %d\n", convertedNum);

    return 0;
}

The output will be:

转化后的string为: 123
转化后的int为: 123

In this example, we first use the sprintf function to convert the integer num into a string str, where %d represents outputting the integer in decimal form. We then use the atoi function to convert the string str back into an integer called convertedNum.

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