#include<stdio.h> void demo56_2() { int hour[3],min[3],sec[3]; int sum1, sum2, sum, i=0; for(i=0; i<2; i++) { scanf("%d:%d:%d",&hour[i], &min[i], &sec[i]); } sum1 = hour[0]*3600+min[0]*60+sec[0]; sum2 = hour[1]*3600+min[1]*60+sec[1]; if(sum1<=sum2) sum = sum2 - sum1; else sum = sum2 - sum1 + 3600*24; hour[2] = sum/3600; min[2] = sum%3600/60; sec[2] = sum%60; printf("%02d:%02d:%02d",hour[2], min[2], sec[2]); } /* /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../x86_64-linux-gnu/crt1.o: In function `_start': (.text+0x20): undefined reference to `main' collect2: error: ld returned 1 exit status */ |
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