33 lines
523 B
C
33 lines
523 B
C
#include "stdio.h"
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char *replace_blank(char *source){
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int count = 0;
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char *tail = source;
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if (source == NULL) return NULL;
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while(*tail != '\0'){
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if (*tail == ' ') count++;
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tail++;
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}
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while(count){
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if(*tail != ' '){
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*(tail+2*count) = *tail;
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}else{
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*(tail+2*count) = '0';
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*(tail+2*count-1) = '2';
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*(tail+2*count-2) = '%';
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count--;
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}
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tail--;
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}
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return source;
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}
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int main(int argc, char const *argv[])
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{
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char str[100]="we are happy";
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printf("ret=%s\n",replace_blank(str));
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return 0;
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}
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