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			17 lines
		
	
	
		
			362 B
		
	
	
	
		
			C
		
	
	
	
	
	
			
		
		
	
	
			17 lines
		
	
	
		
			362 B
		
	
	
	
		
			C
		
	
	
	
	
	
#include <stdio.h>
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#include <string.h>
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int main(){
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    FILE *fp = fopen("example.txt","r+");
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    if(fp == NULL){
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        printf("error,cannot open file");
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        return 1;
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    }
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    char buffer[100];
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    fread(buffer,sizeof(char),100,fp);
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    printf("%s\n",buffer);
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    char *wt = "hello, World1!";
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    fwrite(wt,sizeof(char),strlen(wt),fp);
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    fclose(fp);
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} |