带参数的main函数（一）

 

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自己改的程序： #include <stdio.h> #include <stdlib.h> #include <string.h>   typedef char BYTE; typedef float DWORD;   int main(int argc,char *argv[]) {     int i;     FILE *fp1,*fp2;     int aa,bb;       sscanf(argv[2],"%d",&aa);         //将字符符型改为整型                                        //sscanf函数参见msdn或者百度，google     sscanf(argv[3],"%d",&bb);         BYTE  *data1=(BYTE *)malloc(aa*bb*sizeof(BYTE));           printf("%d\n",aa*bb);     //用于调程序时候查看参数传的是否正确。       DWORD *data2=(DWORD *)malloc(aa*bb*sizeof(DWORD));           if((fp1=fopen(argv[1],"rb"))==NULL)     {          printf("can not open file!");          return 0;     }     if((fp2=fopen(argv[4],"w"))==NULL)     {         printf("can not open file!");         return 0;     }       memset(data1,0,aa*bb*sizeof(BYTE));     /* 初始化 */     memset(data2,0,aa*bb*sizeof(DWORD));           fread(data1,sizeof(char),aa*bb,fp1);        /* 将fp1里面的内容读入到data1*/       for(i=0;i<aa*bb;i++)     {         data2[i]=((int)data1[i])*1.0;                           /* data1里面的数据转换为浮点型 */     }           for(i=0;i<aa*bb;i++)     {         if((i%bb)==0)                                   /* 一行640列 */         {             if(i==0)                                            /* 写进去的第一个数字 如果省略，第一行将会多换空白 */             {                 fprintf(fp2,"%-4.0f",data2[i]);             }             else             {                 fprintf(fp2,"\n",data2[i]);                     /*  每640列换行 */                 fprintf(fp2,"%-4.0f",data2[i]);                 /* 换行完还得继续写数据，不能忘记 */             }               }         else         {                               fprintf(fp2,"%-4.0f",data2[i]);                     /* 再把浮点转换为字符并写入到fp2里面 */         }     }                fclose(fp1);     fclose(fp2);     free(data1);     free(data2);           return 0; }