C语言中的字符替换与截取

#include<stdio.h> #include<string.h> void change(char *); void chaeck(char *); void replace(char *); int main() { char temp[6][20] = {"1.*\n", "2.**58\n", "*002.4*50\n", "46.*\n", "56.*2\n", "00010.*\n"}; for(int i = 0;i <6; i++) { change(temp[i]); printf(temp[i]); replace(temp[i]); printf(temp[i]); printf("\n"); } return 0; } void change(char *string) { int len = strlen(string); for (int i=0; i<len; i++) { if (string[i] == '*') { string[i] = '0'; } } } void replace(char *string) { char *temp; bool isfloat = false; int len = strlen(string); len = len -1; //去掉前面多余的零 for(int i = 0;i <len; i++) { if(string[i] == '0') { len =len -1; } else { break; } } int gap = strlen(string) - len -1; //多减一是要去掉那个"\n",gap即为0的个数 printf("----------%d %d\n",strlen(string)-1,gap); for(int i =0;i<len;i++) { string[i] = string[i +gap]; } string[len] = '\0'; //判断是否是folat，如果是则要去掉后面的0 for(int i =0 ;i <len ;i++) { if(string[i] == '.') //遇到了.就停止扫描和去零操作 { isfloat = true; } } if(isfloat) { while((string[len-1] == '0')||(string[len-1] == '.')) { len = len -1; if(string[len-1] == '.') { len = len -1; break; } } string[len] = '\0'; } }