#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>#define MAX_PATH   256
char filename[MAX_PATH + 5];
int main(int argc, char** argv)
{//數字字符串轉數字const  char* kk = "689";int zhi = atoi(kk) + 8;//數字字符串轉doubledouble zhi2 = atof(kk) + 2;printf("result : %f \n", zhi2);//數字轉字符串int nn = 58;char zu[20];snprintf(zu,20, "%d", nn);printf("%d-----%d-----%s", sizeof(zu),strlen(zu),zu);getchar();return 0;
}

結果:?

FR：徐海濤(hunkxu)?