[問題] 請問一下這段程式的bug

看板C_and_CPP作者winbill84063 (有妹妹真好)時間10年前 (2015/05/01 21:07)推噓2(2推 0噓 11→)

留言13則, 7人參與討論串1/1

#include<stdio.h> #include<stdlib.h> #include<string.h> int main () { char line[4]; char label[7],opcode[7],operand[8]; //char startAddr[5]; int LOCCTR = 0; char comment[50]; char checkOP[7]; int count = 0; FILE *input,*inter,*output,*OP; input = fopen("input.txt","r"); inter = fopen("intermediate.txt","w"); OP = fopen("OPTAB.txt","r"); if(input == NULL){ printf("Can't read input\n"); } else{ if(fscanf(input,"%s %s %s %s",line,label,opcode,operand)!=EOF){ //處理第一行的部分 if(!strcmp(opcode,"START")){ fprintf(inter,"%s %04d %s %s %s\n",line,LOCCTR,label,opcode,ope rand);//將第一階段結果寫入中間檔案 fscanf(input,"%s %s %s %s",line,label,opcode,operand); //讀取下一行 } else{ printf("failed\n"); } } while(strcmp(opcode,"END")){ if(strcmp(label,".")){ //若不是敘述就執行 while(fscanf(OP,"%s",checkOP)!=EOF){ //------------------------->有問題! ! printf("begin here\n"); if(!strcmp(opcode,checkOP)){ LOCCTR = LOCCTR+3; } else if(!strcmp(opcode,"WORD")){ LOCCTR = LOCCTR+3; } else if(!strcmp(opcode,"RESW")){ LOCCTR = LOCCTR + 3*atoi(operand); } else if(!strcmp(opcode,"RESB")){ LOCCTR = LOCCTR + atoi(operand); } else if(!strcmp(opcode,"BYTE")){ if(operand[0] == 'C'){ if(operand[count]!='\0'){ count++; } LOCCTR = LOCCTR + (count-3); } else if(operand[0] == 'X'){ LOCCTR = LOCCTR + 1; } } } } else{ //如果是敘述則將敘述部分直接貼上 fgets(comment,50,input); fputs(comment,inter); fscanf(input,"%s %s %s %s",line,label,opcode,operand); //讀取下一行 } fprintf(inter,"%s %04d %s %s %s\n",line,LOCCTR,label,opcode,oper and);//將第一階段結果寫入中間檔案 } } system("pause"); return 0; } 小弟覺得是 while(fscanf(OP,"%s",checkOP)!=EOF)的問題因為把OP換input 結果雖然一定是錯的但不會停止運作 -- Sent from my Android -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 60.244.195.7 ※ 文章網址: https://www.ptt.cc/bbs/C_and_CPP/M.1430485660.A.C0A.html

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