C语言TXT文本修改？

假设原始文件名为a.txt修改后为b.txt，都放在c:\data目录下

#include<哪谈stdio.h>

void main() { FILE *fp,*tpchar buffer[256]

if ( fp=fopen("c:\\data\\a.txt","r") ) {

if ( tp=fopen("c:\\data\\b.txt","w+") ) {

while ( !feof(fp) ) {

fgets(buffer,256,fp)

if ( buffer[0]='R' &&buffer[1]='E' &&buffer[2]='C' &&buffer[3]='T' )

sprintf(buffer,"RECT 1.215 1.000 1.000 1.000\n")

fputs(buffer,256,tp)

}

fclose(tp)

} else printf("无法建立b.txt。\巧春n")

fclose(fp)

} else printf("无法打开a.txt读取。\n")

}

其中的条孝缓耐件语句的条件可以修改成需要的条件

#include <森行stdio.h>

main()

{char a[100]="0",b[100]

FILE *fp

if((fp=fopen("e:\\1.txt","w+"))==NULL)

    {printf("找不到文件")

    exit(0)

    }

printf("输入字符串：")

scanf("此雹哗%s",a)

fputs(a,fp)

printf("已写入e盘肆拦1.txt\n")

printf("读取e盘1.txt...\n")

fseek(fp,0,0)

fgets(b,100,fp)

printf("成功读入b字符串数组\n")

printf("%s",b)

fclose(fp)

}

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