执行shell命令

#include <stdlib.h>

system("clear");

#include <stdio.h>
int main (){
    char c[100];
    FILE *fp;
    fp=popen("curl cooolr.cn","r");
    fgets(c, sizeof(c), fp);
    printf("%s",c);
    pclose(fp);
    return(0);
}

#include <stdio.h>
#include <string.h>

char * system(char *command) {
    char buffer[1024];
    static char output[65535];
    memset(output, 0, sizeof(output));
    FILE *fp = popen(command, "r");
    while (fgets(buffer, sizeof(buffer), fp)) {
        strcat(output,buffer);
    }
    fclose(fp);
    return output;
}

int main() {
    char *output = system("curl http://baidu.com");
    printf("%s",output);
    return 1;
}