只做了正整数的情况，你看是不你想要的#include <stdio.h>#include <string.h>int String2Int1(char *pHead, char *pEnd){ int retVal=0; while (pEnd>=pHead) { retVal*=10; retVal+=*pHead-'0'; pHead++; } return retVal;}int String2Int2(char *pHead, char *pEnd){ if (pHead==pEnd) { return *pHead - '0'; } else { return 10 * String2Int2(pHead, pEnd-1)+*pEnd-'0'; }}int main(){ char *p="123456"; int r=0,t=0; r=String2Int2(p,p+strlen(p)-1); printf("%d\n",r); t=String2Int2(p,p+strlen(p)-1); printf("%d\n",t); return 0;}