实现strstr函数

int strstr(char[] str, char[] par)) { char str[]="rocrocket is me."; char substr[]="t i"; int strsize; int subsize; subsize=strlen(substr); strsize=strlen(str); int i=0,j=0; while((j!=subsize)&&(i!=strsize)){ if(str[i]==substr[j]){ i++; j++; }else{ i=i-j+1; j=0; } } if(j==subsize){ printf("Matched!\n"); }else{ printf("Pity!\n"); } return 0; }