c语言 9-6
1、
#include <stdio.h> int search(char x[], int c) { int i = 0, j = 0; while(1) { if(x[i] == c) { j++; } if(x[i] == '\0') break; i++; } return j == 0 ? 0 : j; } int main(void) { char str[128]; printf("str: "); scanf("%s", str); printf("c number: %d\n", search(str, 'c')); return 0; }
2、
#include <stdio.h> int search(char x[], int key) { int i = 0, j = 0; while(x[i] != '\0') { if(x[i] == key) j++; i++; } return j; } int main(void) { char str[129]; printf("str: "); scanf("%s", str); printf("c number: %d\n", search(str,'c')); return 0; }
3、
#include <stdio.h> int search(char x[], int key) { int i = 0, j = 0; while(x[i]) { if(x[i] == key) j++; i++; } return j; } int main(void) { char str[128]; printf("str "); scanf("%s", str); printf("c number: %d\n", search(str, 'c')); return 0; }