ATOI – convert ASCII string to integer
#include <stdlib.h>
#include <stdio.h>

int main() {
char c[] = “1”;
int num = atoi(c);
num++;
printf(“Num = %d”, num);
}

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

int main() {
char c[10];
c[0] =’7′;
c[1] =’5′;
c[2] =’\0′;
int num = atoi(c);
printf(“Num = %d\n”, num);
num++;
printf(“Num = %d\n”, num);
}

เพิ่มเติม: visualcplus.blogspot.com