[閒聊] read data3

[PanJC ((#‵Д′)f〒﹌﹌﹌﹌﹌ꄩ]

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

int main(int argc, char *argv[]){
        FILE *data;
        if(argc != 2){
                printf("\n");
                printf("Command line format ERROR!\n");
                printf("Usage: %s filename\n",argv[0]);
                printf("\n");
                return 0;
        }
        data = fopen(argv[1],"r");
        // "r" : read data
        // "w" : write data
        // "a" : write and append to
        if(data == NULL){
                printf("%s is not found!\n",argv[1]);
                return 0;
        }
        fclose(data);
}

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