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https://github.com/Kiritow/OJ-Problems-Source.git
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20 lines
330 B
C
20 lines
330 B
C
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/*
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作者:千里冰封
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题目:p1023 GPA计算
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*/
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#include <stdio.h>
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int main(int argc, char* argv[]){
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int a, i,c = 0, m = 0;
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float n = 0.0, tol = 0.0;
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scanf("%i", &a);
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for(i = 0; i < a; i++){
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scanf("%i%f", &m, &n);
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tol += m * n;
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c += m;
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}
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printf("%.2f", tol / c);
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return 0;
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}
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